Production Process: calcined bauxite, in the combustion process and subject to decomposition dehydration, secondary and re-crystallization mullitization burned through three stages, after Raymond crushed into powder processed oscillation, divided into different sieve size. Specifications: 100 mesh, 200 mesh, 250 mesh, 300 mesh (the production of various specifications according to customer requirements) Usage: mainly used for precision casting, refractory products, alumina cement manufacturing, abrasive materials, ceramic industry, can be made firebrick were kind of grade bauxite to aluminum hydride metallurgy, refractory, building materials, chemical raw materials, such as the main ingredient.